The Codimerization of Styrene with Ethylene Catalyzed by Olefin-palladium(II) Chloride Complexes

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概要

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• The codimerization of styrene with ethylene catalyzed by the olefin-palladium chloride complexes was investigated in a homogeneous system under mild conditions; di-μ-chloro-dichlorobis-(styrene)dipalladium(II), (Pd(C<SUB>6</SUB>H<SUB>5</SUB>CH=CH<SUB>2</SUB>)Cl<SUB>2</SUB>)<SUB>2</SUB>, was found to be an effective catalyst. When ethylene was bubbled into a styrene solution containing the styrene-palladium complex at 50°C for 6 hr, codimers including <I>trans</I>-1-phenyl-1-butene, <I>cis</I>-1-phenyl-1-butene, and <I>trans</I>-1-phenyl-2-butene were obtained in 1278, 57 and 170% yields respectively, based on palladium(II) used. However, the absence of ethylene resulted in the formation of a 70% yield of the dimer of styrene, <I>trans</I>-1,3-diphenyl-1-butene. The order of the solvent effect on the rate of the codimerization was as follows: nitrobenzene>nitromethane>acetic acid, phenol>dioxane>>benzene>>acetonitrile. A possible mechanism for this reaction was discussed on the basis of the present results.

• 公益社団法人 日本化学会の論文

著者

• Imanaka Toshinobu

  Department Of Chemical Engineering Faculty Of Engineering Science Osaka University

• Teranishi Shiichiro

  Department of Chemical Engineering, Faculty of Engineeing Science, Osaka University

• Kawamoto Keiji

  Department of Chemical Engineering, Faculty of Engineering Science, Osaka University

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